Identify protocols that work at OSI Layers 2, 6, 3, 4, and 7. A. ARP, SQL, ICMP, SMB, and SNMP B. L2TP, SMB, IP, SQL, and HTTP C. WEP, ASCII, IPX, TCP, and BootP D. PPP, ZIP, SPX, UDP, and TFTP Solution Please follow the data : The OSI Seven Layer Model : The definition of the model for Open Systems Interconnection, or OSI, is used to define modes of interconnection between different components in a networking system. It consists of a 7 layers in the flow. 7 Application Layer 6 Presentation Layer 5 Session Layer 4 Transport Layer 3 Network Layer 2 Data Link Layer 1 Physical Layer Considering the provided question with the options, the protocols used in the respective layers of 2, 6, 3, 4, and 7 are : 7 Application Layer : This layer consists of many protocols that are defined for use at the Application layer, such as HTTP, FTP, SMTP, BootP and Telnet. 6 Presentation Layer : In this layer the mechanisms to convert between text formats such as ASCII and Unicode may be considered part of the Presentation layer. 4 Transport Layer : The protocols such as TCP, UDP, and ICMP are examples of Layer 4 protocols used to provide a delivery mechanism between end stations. 3 Network Layer : Internet Protocol (IP) and Internet Packet Exchange (IPX) are examples of Network layer protocols. 2 Data Link Layer : The protocols such as the Ethernet, WEP, Token Ring, and Frame Relay are all examples of Data Link layer or Layer 2 protocols. So the best match of the options given for the sequence of given question is WEP, ASCII, IPX, TCP, and BootP. Subsequently, the choice is OPTION C (WEP, ASCII, IPX, TCP, and BootP). Hope this is helpful. .